Our Right Lungs takes more air than our left lung.
194
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Our brains have a negativity bias and will remember bad memories more than good ones.
15
On average, there's 100 billion neurons in the human brain.
83
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
If the human eye was a digital camera, it would have 576 megapixels.
25
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21